<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		
		<script type="text/javascript">
			`use strict`
			
			console.log("hello  console！！");
			
			var a = 3;
			a = 4;
			console.log(a)
			
		</script>
	</body>
</html>
